Lock.



'No. 654,003. Patented July l7, I900. B. JEHTZEN 8:. 0. HUGE.

LOCK.

(Application filed Kay 16, 1899.)

(no Model.)

UNITED STATES PATENT OEEIcE.

RUDOLPH JENTZEN AND CARL HOGE, OF ALTONA, GERMANY.

LOCK.

SPECIFICATION forming part of Letters Patent No. 654,003, dated July1'7, 1900.

Application filed May 15, 1899. Serial No. 716,820. (No model.)

To ctZZ whom it may concern:

Be it known that we, RUDOLPH JENTZEN and CARL new, subjects of theEmperor of Germany, residing at Altona, Germany, have invented certainnew and useful Improvements in Locks, of which the following is aspecification.

Our present invention relates to safety mechanism adapted to be appliedto any kind of locks and to be locked by grooved keys, so that they canbe opened only by means of the keys which have been employed for lockingthem.

The improvements consist in the features of construction and combinationof parts fully described hereinafter, and specifically pointed out inappended claims.

In order that the invention may be the more readily understood andcarried into effect,"

reference is hereby made to the accompanying drawings, in which- Figurel is a front elevation of a padlock provided with our improvements. Fig.2 is a side elevation of same. Fig. 3 shows a section on line a: a: ofFig. 4. Fig. 4 is an inner view of the mechanism in inoperativeposition, one of theplates of the padlock being moved aside. Fig. 5shows the same mechanism actuated by means of a key to permit theintroduction of a shouldered pin.

In the drawings like numerals refer to like parts throughout all thefigures.

Referring to the several views of the drawings, 1 represents the box orcasing of a padlock, having two plates 2 3 riveted or otherwise securedonto the cylindrical box or casing and provided with ears or extensions8 8, perforated or apertured to receive pins 4 4, preferably made onewith an eye 5, carrying a ring 7, receiving the end link of a chain 9,the other end of which carries a pin 10, provided with shoulders orcircular steps, as hereinafter described. The bottom plate 3 is providedwith a circular opening 11 and an opening 12 for the passage of the key.

To the center of the plate 2 and within the padlock is secured a shaft13, over which are fitted the extensions 15 of sections 14 14 14 14 14,freely sliding over each other and moving about said shaft 13. Theextension 15 of each section is provided with gear-teeth, and eachsection has four openings 21 21 21 21 which when in inoperativepositioningister with each other. The openings indicated by numeral 21register with opening 11 in the plate 3 and with a recess 2, provided inplate 2. All the openings 21 have equal diameter except opening 21 ofsection 14 adapted to slide over the inner surface of plate 2, saidopening being of smaller diameter than the others.

Each toothed extension 15 of the sections 14 meshes with a correspondingsegment16, and said segments are equal in number with the sections 14and are fitted against each other and over a stationary pin 17, aboutwhich they may be moved. Between each pair of adjacent segments 16 isinserted a disk 19, and each segment 16 is providedwith a groove 40,engaged bya spring 20, attached to a rod 22 and fitted around a rod 22,said rods being fixed to the inner side of the plate 2.

45 is a stop-pin for the key, and 18 the pintle on which the key isfitted when applied to the lock.

The pin 10 has annular shoulders of difierent diameters, and uponinserting it in the look through the opening 11 the first shouldercorresponds to the thickness of plate 3, each of the five followingshoulders corresponding to the five sections 14 to 14 and the endshoulrested by plate 14 the opening 21 of which is too small to permitthe passage of the end of the pin. 7 grooved key is fitted to the pintle18, said key having branches corresponding to the thickness of thesections 14 to 14 and of proper length to engage the sides or edges ofsegments 16, so that upon turning the key the latter will be rotated adistance corresponding to the length of the respective branches and thesegments will in turn rotate the plates 14 to the same extent or untilthe Before inserting the pin 10 a large opening in the plate 1& isbrought into line with the corresponding openings in the other plates,and thus permit the insertion of the pin to the full depth. UponWithdrawing the key the springs 20 pressing on the segments bring theminto their normal posi tions so far as permitted or until the edges ofthe openings in the sections engage the ad jacent shoulders in the pin10, thus preventing the withdrawal of the latter except through themedium of the locking-key, whereby the parts are returned to theirregistering positions.

Having thus described our invention, What we claim as new, and desire toobtain by Letters Patent, is

1. In a safety mechanism for looks, the combination with a casing havingplates 2 and 3, of a shaft centrally mounted in one of said plates, aplurality of segments mounted on said shaft and each provided with atoothed extension and having a series of openings therein, one of saidopenings in one of the segments being of less diameter than the otheropenings, the pin 10 adapted to engage said openings and means engagingthe toothed extensions of said segments whereby the latter may beoperated.

2. In a mechanism of the character described, the combination With thecasing, a central shaft in said casing, a series of segments mounted onsaid shaft and having toothed extensions, a pin '17 in the casing, aseries of toothed segments loosely mounted on said pin, and adapted toengage the extensions aforesaid, disks between said lastnamed segments,springs for operating the latter secured to the casing, a key-slot inone of the plates, a key-pintle, and suitable stopfor the key, fixed inthe ease, substantially as set forth.

RUDOLPH 'JENTZEN. CARL HOGE. Vitnesses:

E. H. L. MUMMENHOFF, OTTO W. HELLMINK.

